.myctrl{
    text-align: center;
    width:600px;
    height: 30px;
    margin:0 auto;
    margin-top:10px;
    margin-bottom: 20px;
}
.imagesilder{
    margin: 0 auto;
    width:600px;
    height: 400px;
}
.imageitem{
    width:600px;
    height: 400px;
}